Method of preparing full biodegradation copolymer from ring-opening polymer

A technology of ring-opening polymerization and full degradation, which is applied in the field of ring-opening polymerization of hydroxyl-terminated polyester oligomers to prepare biodegradable copolymers, achieving the effects of easy industrial integrated production, high molecular weight, and fast degradation speed

Active Publication Date: 2007-02-07
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In summary, there is no research report on the preparation of linear polyester copolymers by synergistically initiating ring-opening copolymerization of cyclic ester and lactide compounds in existing literature and patents.

Method used

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  • Method of preparing full biodegradation copolymer from ring-opening polymer
  • Method of preparing full biodegradation copolymer from ring-opening polymer
  • Method of preparing full biodegradation copolymer from ring-opening polymer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 800g of LLA refined and purified by ethanol recrystallization method, M w =(4-5)×10 4 Hydroxyl-terminated polybutylene adipate (PBA) 200g, stannous octoate 0.8g adds vacuum reactor, fills with N 2 After 2-3 repeated operations, the system pressure drops below 60Pa, and the reaction temperature rises to 135°C. After 12 hours of reaction, N 2 Gas protection discharge, get M w =(1.5-3)×10 5 The poly(butylene adipate-co-L-lactide) biodegradable resin.

Embodiment 2

[0029] 800g of DLLA refined and purified by ethanol recrystallization method, M w =(1-2)×10 4 Hydroxyl-terminated polybutylene terephthalate (PBT) 200g, aluminum isopropoxide 1.6g is added to the vacuum reactor, filled with N 2 After 2-3 repeated operations, the system pressure drops below 60Pa, and the reaction temperature rises to 140°C. After 10 hours of reaction, N 2 Gas protection discharge, get M w =(1.5-3)×10 5 The poly(butylene terephthalate-co-D, L-lactide) biodegradable resin.

Embodiment 3

[0031] 800g of DLLA refined and purified by ethanol recrystallization method, M w =(3-5)×10 4 80g of hydroxyl-terminated polybutylene succinate (PBS) and 2.4g of tetrabutyl titanate were added to the vacuum reactor, filled with N 2 After 2-3 repeated operations, the system pressure drops below 60Pa, and the reaction temperature rises to 130°C. After 15 hours of reaction, N 2 Gas protection discharge, get M w =(1.5-3)×10 5 The poly(butylene succinate-co-D, L-lactide) biodegradable resin.

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Abstract

the invention discloses a preparing method of biological full-decomposing copolymer based on hydroxyl terminated PE low-polymer in the macromolecular material technological domain, which comprises the following steps: placing refined purified cyclic lactone compound, hydroxyl terminated PE low-polymer and catalyst in the vacuum autoclave; aerating N2; extracting into vacuum; repeating these operations; reducing system pressure below 60Pa; reacting at 130-140 deg.c for 10-15 h; discharging to obtain macromolecular and narrow distributed product.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a method for preparing a fully biodegradable copolymer by triggering ring-opening polymerization of hydroxyl-terminated polyester oligomers. Background technique [0002] Biodegradable polymers refer to a class of polymer materials that can be decomposed or enzymatically hydrolyzed by microorganisms in a specific environment to produce small molecular substances. The biodegradable polymers that have been researched and developed mainly include three categories: natural polymers, microbially synthesized polymers and artificially synthesized polymers. Among them, natural degradable polymers include starch, cellulose, polysaccharides, chitin, chitosan and their derivatives, etc.; degradable polymers synthesized by microorganisms include polyhydroxyalkyl alcohol esters, poly(β-malate) etc. Synthetic degradable polymers include poly-α-hydroxy acid esters, polyca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/08
Inventor 任杰赵鹏任天斌顾书英
Owner TONGJI UNIV
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